spacers or wider wheels, trying to decide Options

[lagos]

im trying to figure out what would push my rims out more so that they are flush with the body. i think my current rims are 40offset 7in wide. if i get a 25mm spacer, that will push them out about 1 inch.

now my other option is to get 17x8s with 35 offset. i used the offset calculator, and it tells me that the differece between the new rims and my old ones would only be 18mm
http://www.1010tires.com/WheelOffsetCalculator.asp

so, am i missing something here? the spacer would push the wheels out the most, right?

[celicaST]

ummm big difference?, you have got to be kidding me. both dry air and dry nitrogen are essentially going to behave very similarly. one proposed benefit of nitrogen inflation is reduced oxidation of the tire from the inside, and n2 is a larger molecule than o2 and therfore it will diffuse through the casing more slowly. however, most people replace tires due to thread life WAY before any significant oxidation, and the relative diffusion rates between air (which is compsed of 78% N2 volumetrically) and pure N2 is neglible compared to leaking at the valve. better ride and mileage, im sorry but that just makes no sense whatsoever and is more likely a pschological improvement. nice wheels by the way

This post has been edited by celicaST: Oct 21, 2005 - 2:11 AM